Roskilde pollen forecast — Roskilde Festival (Festivalplassen) neighborhood

On 25 June 2026, overall pollen levels in Roskilde are low. Cypress is the main contributor to airborne pollen, while grass remain at lower levels

On 26 June 2026, pollen conditions in Roskilde will be different from today, with cypress at low levels and grass increasing

According to the five-day outlook, cypress and grass pollen levels are expected to gradually decrease, suggesting improving conditions later in the week.

On 25 June 2026, Cypress is the dominant pollen source in Roskilde. grass are also present but at lower levels. birch, hazel, willow, and alder are not currently active.

Roskilde's pollen season runs from January through August, opening with hazel and alder from January before birch peaks strongly through April and May. Grass pollen peaks through June and July. The Roskilde Fjord position means coastal winds can periodically disperse pollen, while surrounding Zealand farmland and the flat, open Danish landscape contribute substantial grass and crop pollen throughout the well-defined Scandinavian seasonal progression.

The Roskilde pollen forecast is updated four times daily. See the timestamp below for the most recent update.

Studies show that most pollen exposure (often 70–90%) comes from nearby sources, such as local trees and vegetation. A good pollen forecast therefore depends on accurately representing local vegetation. Pollen can travel long distances, but this usually matters only early in the season or during specific wind events.

Pollen data is often misunderstood. Most "pollen levels" are not real-time measurements, but forecasts.

Direct pollen measurements are typically delayed by 1-2 days because they require manual analysis. To show current conditions in Roskilde, modern forecasts combine recent measurements, weather data, and information about local vegetation.

This allows us to estimate pollen levels for today and the coming days, not just report the past.

Airmine’s atmospheric monitoring platform was developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team, using satellite and Earth observation technologies to improve emissions monitoring.